A small block of solid aluminum is removed from a freezer and heated from -5C to 5C in 5 minutes using a hot plate. The hot plate provides a constant rate of heat output during this time.

Answer:

compound

Explanation:

Answer:

compound

Explanation:

A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds. When two hydrogen atoms combine with one oxygen atom, it becomes the compound water

Answer:

Water is a compound. It contains more than one element: hydrogen and oxygen atoms are joined together;

Answer:

c?

Explanation:

sorry, im not too great with this lol. i probably have it wrong, so i wouldnt really trust my answer lol.

Question: Which cup has more thermal energy?

                  A. 2 liter cup of milk

                  B. 1 liter cup of milk

Answer: A. 2 liter cup of milk

Explanation:

We have milk in both of the containers. The milk in both containers is the same temperature, so we will have to measure the amount of molecules. The amount of molecules makes it warmer, and if it is warmer, that is more energy. 2 liters have more thermal energy than 1 liter, because it has more molecules.

Our answer is 2 liter cup of milk.

Answer:

the first two elements of array are checked and the largest of these two elements are placed in arr[0]

the first and third elements are checked and largest of these two elements is placed in arr[0] .

this process continues until the first and last elements are checked.

Explanation:

Then you would find the largest Elements

Answer:

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Answer:

the dog barked is the answer

Answer:

Molarity = 0.65 M

Explanation:

Given data:

Mass of CH₄N₂O  = 250 g

Volume of solution = 6.0 L

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Number of moles of solute:

Number of moles = mass/molar mass

Number of moles = 250 g/ 64.08 g/mol

Number of moles = 3.9 mol

by putting values,

Molarity = 3.9 mol / 6.0 L

Molarity = 0.65 M

Answer:

A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.Example- Snowflakes, diamonds, and table salt.

Answer:

Examples of everyday materials you encounter as crystals are table salt (sodium chloride or halite crystals), sugar (sucrose), and snowflakes. Many gemstones are crystals, including quartz and diamond. There are also many materials that resemble crystals but are actually polycrystals

Explanation:

a crystal is a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.

Answer:

yes it did.

Explanation:

the product must have produced a smell therefore it created a gas. this means it was a chemical reaction

Answer:

4cro3=2cr2o3+3o2

Explanation:

on left hand side there is 4cr and 12o where as now on wright hand side we have 4cro6+6o which makes 4cr and 12o which is equal to the left hand side.

Answer:

4CrO3====> 2 Cr2O3 + 3O2

Explanation:

Before dealing with the Cr, I think you might want to deal to work with the oxygen in Cr2O3

You might want to turn that into an even number. You could put a 2 in front of the Cr2O3, but looking ahead, I can see that will give you a fractional amount for the O2. So I'll use a 4

CrO3 ===> 4 Cr2O3      +     O2

That means you have 8 Cr s on the right. Balance that on the left

8CrO3  =====> 4 Cr2O3 + O2

You've balanced The Cr s. So now lets look at the oxygens. There are 8*3 oxygens on the left hand side. The right has 12 + 2. Don't touch the Cr2O3. You are done with them.

You need 12 more oxygens on the right. You have 2. So multiply the Oxygens by 6

8CrO3 ===> 4 Cr2O3 + 6 O2     There's a factor of 2 common. Divide by 2

4CrO3====> 2 Cr2O3 + 3O2

The three ways that an atom can fulfill this goal is to give away electrons, take an electron, and share electrons.

When an atom reacts ,its goal is to become more stable by filling its outer electron shell by gaining, loosing or sharing electrons.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

more than 30 seconds

Explanation:

theres some extra

question : To study the actions of the enzyme catalase on hydrogen peroxide, students performed the following experiment. Catalase was extracted from potatoes and stored on ice. The following hydrogen peroxide solutions were made: 1%, 5%, 10%, 15%. Filter paper disks were soaked in the catalase then dropped into each of the solutions. Enzyme activity was measured by the time it took for the disks to float from the bubbles produced. Here is the data:

Which of the following best describes why the disks float faster to the surface in more concentrated solutions?

asnwer

the higher substrate concentrations in the more concentrated solutions speeded up the reaction

yw!

Answer:

A. Wisconsin

Explanation:

In the graph, Wisconsin has the highest speed limit.

Answer:

When the Earth rotates on its axis, it prevents air currents from going in a straight line to the north and the south from the equator. It results in one of the effects of rotation of the Earth: the Coriolis Effect.

Answer:

Ca(OH)2

Explanation:

Answer:

Pressure (P) , Volume (V) , Temperature (T)

Explanation:

An ideal gas has three variables that define its state. They are: absolute pressure (P), volume (V), and absolute temperature (T). The ideal gas law defines how these state variables relate to each other

-------HOPE IT HELPS---------

Answer:

The unknown element is Carbon.

(a) X is Carbon, its oxide is of acidic nature

(b) C+ O2 → CO2

Explanation:

We are given an unknown element that reacts with oxygen.

X + O2 → XO2

It is given that the oxide XO2 turns blue litmus red which is shown by acids, so XO2 is an acidic oxide. Also X will be a Non metal because Non metallic oxide is Acidic in nature.

The Oxide XO2 is dissolving is water. The oxide upon reacting with water will give an Acid.

XO2 type of oxide is found in the 14th group of the periodic table generally

So we have options like C, Si and Ge as these only have the Acidic oxide.

But when it comes to reactivity with water Only Carbon satisfies the need so the unknown element X is C.

CO2 + H2O → H2CO3 which is an acid.

(a) Element X is Carbon (C), The nature of the compound formed is Acidic.

(b) The reaction given will be as follows

     C+ O2 → CO2

Therefore the unknown element is Carbon.

Answer:

The anode made of the impure copper

The cathode made of pure copper

The electrolyte of copper (II) sulfate CuSO₄ solution

The silver impurities at the anode due to their high tendency of accepting electrons and being a stronger reducing agent than either copper or zinc will remain relatively in place and relatively stable and will not actively take part in the oxidation reaction taking place at the anode

The zinc impurities will be the first element of the three metals to give up electrons and go into the solution as zinc ions due to their high tendency to loan out two electrons and become oxidized into Zn²⁺ ions

The drawing of the electrolytic cell created with Microsoft Visio is attached

Explanation:

Answer:

77 moles

Explanation:

The given chemical compound is CCl2F2 is called Dichlorodifluoromethane. In CCl2F2, we have:

one mole of a Carbon atom.

two moles of Chlorine atom; &

two moles of Fluorine atom.

Given that one mole of Chlorine = 38.5 moles.

Then, two moles will be:

= 2 × 38.5 moles

= 77 moles

Answer:

Calories or Protein  don't judge me if i'm wrong on both -__-

Explanation:

Answer:

study of chemical used in industries

Answer:

plz refer to the attachment above .

The number of moles of sucrose dissolved in 250 mL of solution will be = 0.375.

The total number of moles of solute in a given solution's molarity is expressed as moles of solute per litre of solution. As opposed to mass, which fluctuates with changes in the system's physical circumstances, the volume of a solution depends on changes in the system's physical conditions, such as pressure and temperature.

M, sometimes known as a molar, stands for molarity. When one gramme of solute dissolves in one litre of solution, the solution has a molarity of one. Since the solvent and solute combine to form a solution in a solution, the total volume of the solution is measured.

Molarity Formula: (number of moles of solute) / volume

The ratio of the moles of the solute whose molarity needs to be computed to the volume of solvent needed to dissolve the supplied solute is the equation for determining molarity.

Molarity = (number of moles of solute) / volume

0.15 * 250/1000 = number of moles

Number of moles = 15/100 * 25/100 = 0.375

Therefore, the number of moles of sucrose dissolved would be 0.375.

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Answer:

You need to count all the atoms on each side of the chemical equation. once you know how many of each type of atom you have,you can only change the coefficient. (the numbers in front of the atoms or compounds

Answer:

They fertilize the land and help with overgrowth.

Explanation:

The  one way that grazing animals help to maintain grassland ecosystems is: It enhance the plant to grow.

Ecosystems  enables both living organisms such as  animals and non living organisms such as plant to communicate with one another in an environment.

Grazing animals is essential as it help to maintain the  grassland ecosystems by quicken and boosting the growth of plant which inturn help to maintain a very healthy and sustainable  ecosystems.

Grazing lead to the restoration of habitat as it help to  restore back any form of damaged that occur to the natural resources of  ecosystems.

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Answer:

D

Explanation:

at a point somewhere along the equator

In the case when the Sun appears to be directly overhead at noon should be along with the equator.

It is considered to be the imaginary line that should be arounded with the middle of the planet or the celestial body. It is halfway that lies between the  North Pole and the South Pole, at 0 degrees latitude. In the equator, it divides the planet into a Northern Hemisphere and a Southern Hemisphere

Therefore, based on the above explanation, the option d is correct.

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I believe that's true.

The Theoretical yield is the highest amount of product that could be formed from the allocated amounts of reactants.

The Theoretical yield is the greatest amount of product that could be formed from the given quantities of reactants.

The Actual yield is the quantity of product that is formed when the response is carried out in the laboratory.

The Percent yield is the ratio of the authentic yield to the theoretical yield, described as a percentage.

Percentage Yield Formula: When the product that we are obtained after a chemical reaction is known as the yield. We can estimate this accepted yield in moles or grams.

It is the ‘authentic yield’ that we acquire after the completion of a chemical reaction. Separated from this, established on our estimation, we calculate the anticipated yield of a reaction comprehended as the ‘theoretical yield.’

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Answer:

The correct option is;

A. It would favor the forward reaction

Explanation:

Le C_h_a_t_e_l_i_e_r_'s principle states that for a system in dynamic equilibrium a change in the volume, pressure, concentration, or temperature will cause a predictable shift in the reaction to bring about a shift in the equilibrium position which counteracts the change and bring about the establishment of a new equilibrium

Therefore, in the reaction, H₂O + CO₂ → H₂CO₃, we have;

An increase in the amount of the CO₂ concentration in the blood, increases the quantity of the reactants more than the quantity present at equilibrium, therefore, the number of reaction between the H₂O and the CO₂ increases resulting in the formation of more H₂CO₃, therefore, favoring the forward reaction.

Answer:

A. It would favor the forward reaction.

Explanation:

A.P.E.X